The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2003
Filed:
May. 15, 2001
James Madeley, Vancouver, CA;
Creo Products Inc., Burnaby, CA;
Abstract
The present invention is a method to generate alignable orthogonal images from non-orthogonal scans in a double-sided digital-offset-press arrangement by shifting the image data in the multi-channel modulators in a direction and rate that keeps the images orthogonal. The image data is shifted parallel to the cylinder axes and the amount of shift per cylinder rotation equals the distance the multi-channel modulators move relative to their respective cylinders per rotation of the relevant cylinder. This prevents “parallelogram” type distortion in the images and maintains the orthogonality of the original images, thereby allowing the images on the opposing sides of the printing medium to be aligned. The shift can be done continuously or in discrete steps. The invention is also extendable to two-dimensional modulators such as deformable mirror devices (DMD) and liquid crystal light valves (LCLV).